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SeekBar in alertDialog

I am trying to put a SeekBar in an AlertDialog . I have this code:

 AlertDialog.Builder builder = new AlertDialog.Builder(GameScreen.this); LayoutInflater inflater = GameScreen.this.getLayoutInflater(); builder.setView(inflater.inflate(R.layout.betvalue, null)) .setPositiveButton ... .setNegativeButton ... .setTitle("Enter bet amount"); SeekBar sbBetVal = (SeekBar)findViewById(R.id.sbBetVal); tvBetVal = (TextView) findViewById(R.id.tvBetVal); sbBetVal.setMax(playerList[0].getChipCount()); sbBetVal.setProgress(0); sbBetVal.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { // TODO Auto-generated method stub tvBetVal.setText(String.valueOf(progress)); } }); builder.create(); builder.show();

However, this gives me a NullPointerException . Why is this and how can I fix it?

Here logcat:

 01-11 18:16:52.898: E/AndroidRuntime(27668): FATAL EXCEPTION: main 01-11 18:16:52.898: E/AndroidRuntime(27668): java.lang.NullPointerException 01-11 18:16:52.898: E/AndroidRuntime(27668): at com.rhiokai.chipcounter.GameScreen.onClick(GameScreen.java:214) 01-11 18:16:52.898: E/AndroidRuntime(27668): at android.view.View.performClick(View.java:4202) 01-11 18:16:52.898: E/AndroidRuntime(27668): at android.view.View$PerformClick.run(View.java:17340) 01-11 18:16:52.898: E/AndroidRuntime(27668): at android.os.Handler.handleCallback(Handler.java:725) 01-11 18:16:52.898: E/AndroidRuntime(27668): at android.os.Handler.dispatchMessage(Handler.java:92) 01-11 18:16:52.898: E/AndroidRuntime(27668): at android.os.Looper.loop(Looper.java:137) 01-11 18:16:52.898: E/AndroidRuntime(27668): at android.app.ActivityThread.main(ActivityThread.java:5039) 01-11 18:16:52.898: E/AndroidRuntime(27668): at java.lang.reflect.Method.invokeNative(Native Method) 01-11 18:16:52.898: E/AndroidRuntime(27668): at java.lang.reflect.Method.invoke(Method.java:511) 01-11 18:16:52.898: E/AndroidRuntime(27668): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 01-11 18:16:52.898: E/AndroidRuntime(27668): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 01-11 18:16:52.898: E/AndroidRuntime(27668): at dalvik.system.NativeStart.main(Native Method)

And here is the xml:

 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/betvalue" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="10dp" > <TextView android:id="@+id/tvBetVal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:text="@string/chips_fill" android:textAppearance="?android:attr/textAppearanceLarge" /> <SeekBar android:id="@+id/sbBetVal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@+id/tvBetVal" android:layout_centerHorizontal="true" /> </RelativeLayout>
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1 answer

Try this way ..

The original seekbar and textview must be executed using a bloated view.

  AlertDialog.Builder builder = new AlertDialog.Builder(GameScreen.this); LayoutInflater inflater = GameScreen.this.getLayoutInflater(); View v = inflater.inflate(R.layout.betvalue, null); builder.setView(v) .setPositiveButton ... .setNegativeButton ... .setTitle("Enter bet amount"); SeekBar sbBetVal = (SeekBar)v.findViewById(R.id.sbBetVal); tvBetVal = (TextView)v. findViewById(R.id.tvBetVal); sbBetVal.setMax(100); sbBetVal.setProgress(0); sbBetVal.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { // TODO Auto-generated method stub tvBetVal.setText(String.valueOf(progress)); } }); builder.create(); builder.show();

Happy coding :)

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